HbNavigationButton
{
    layout:navigationbuttonlayout;
}

HbNavigationButton::toucharea
{   
    top: expr((1/3)*var(hb-param-widget-chrome-height));
    fixed-height: var(hb-param-widget-chrome-height);
}

HbNavigationButton::text{    
    fixed-width:0un;
    fixed-height:0un;
}